[bug #27782] drawInRect:fromRect:operation:fraction: doesn't work correctly in a flipped view

[Fred Kiefer]

Follow-up Comment #15, bug #27782 (project gnustep):

I like the idea of removing all those isFlipped checks in gui. I always
suspected that they were only compensating for one-another. But then you had
to add one yourself for the NSView -scrollRect:by: method. The rest of the
patch on this method I don't understand. When we do our computation on the
lower methods correctly switching to another view here (in this case to the
base view) should have no effect at all. If it does, we are doing something
else wrong. And according tot he comment your patch wont work for other
backends. Is this still true?

NSImageCell:
When the control view is nil, is_flipped will always be false. We don't need
to check for both conditions.
I don't think we should mess with transformation here. As far as I understand
it, you are doing this to guarantee that images are always oriented upwards,
which is the way they handled by NSCell.






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